Sealing unit



Jdn. 14, 1947. H. A. ALEXANDERSON ETAL 4,

SEALING UNIT Filed Nov. 28, 1942 2 Sheets-Sheet 1 Jan. 14, 1947. H. A.ALEXANDERSON EIAL 19 SEALING UNIT Filed Nov. 28, 1942 2 Sheets-Sheet 2Batented -Jami145 71947 Q g i 2 414 219 U I rfSTA'lZ-ES: PATENT? OFFICEI SEALING UNIT @Howard .A.v .Alexanderaon, Woodridge, and Miller-manJ.-Woll, Red Bank, N. aaaignors to'Bendix Aviation Corporation, SouthBend, and, a corporation of Delaware l Application November as, 1942,Serial No. 467,240

' 1 2 Claims. (Cl.- zen-103) "l'hiv'sxinventionirrelates tosealingidevices, and with an air chamber 32 and a port 83, and itsparticularlyrto:rotarywalveisealsror air distribother end terminating ina radially directed .uting systems. mouth 34. Port 33 is normallyconnected through "maintain .an.-e'ifective seal-under conditions ot '85having a cylindrical liner 36 and a series of mlsalignmentfotzthedistributor. angularly disposed and radially directed ports 3'!"lityis.anotherobject of'ithe-inventionrto proopening-into the chamber.The bottom port 31 gof ggelf compenggflon in us of Fig. 1 communicateswith the throat .38 01' a rior.irregularities encountered :insurracestobe V n i t 39 h v ng an upper section 40 sesealed. a j cured tohousing 01' valve 21 by studs 4| of Fig. 2,, "Other objects will appear.i'rom a study of the and a l w r s ction 3 s cur d t th iupper seuviollowing'speciflcatlon whenzmadeinconjunction tion'. by a srew-threaded union The inwith the-V attachedqdrawings; throughout whichner. adjacent surfaces of Venturi sections 40 and likenumerals:designatelikeparts. 43 are notin contact, but are spaced aslight :"Flg; 1 is an elevational and longitudinal, secamount (forexample,-one one-hundredth of an fi tional :view:o nan-air distributingdevice employn h) apart. as represented y the annular slot- -ing rthese'ingunitoithepresant invention. t d p rture 45. This aperture 45afl'ords direct Fig.1 2 :lsaan, enlarged cross-sectional view 01'communication air tw n pa sa y n theeairxdistributingwdcvioe*and'sealinz unit taken the throat 38 or venturi b way or the annular,q.valongtheiline i lot iFig. l. chamber 41 formed between theoverlapping, but Big. 3isaplantview oi' theseal-i'acing member spacededges of sections 40 and 43. Passageway r whichispartaof-thepresentinvention. 48 opens into valve chamber by wayof the a Fig4:is'a;'longitudina1,- sectional view or. the c s ly is s d bo es 50 and Itiacingmemberztakenalongthe'lineH of Fig. 3. 25 Venturi l8 terminates ina conduit portion hav- 1 18.;5g11B BJIOZ'OSS-SECUODBI view of the facingi a n nti n l ouplin land 49 .fOr conmember takenaalong th me 5-! ofFig. 3. nesting the venturi to the atmosphere at a, point [F1846,.is;anvenlarged; fragmentary, sectional of low pressure on an airplane.ior example, a "view otthei'acingmember-taken from thesectlon r ilingwing surface. I

otill'lg. 4. g 7 .30 Allports 37. other than the bottom port, open Fig;7 is a plan view of the gasket which is part into transversely extendingv ofthesealing1unitoo1'*the presentainvention; and h ving oppositelydisposed and aligned conduit "Fig,.8 1s.-a longitudinal, sectional vi oft couplings connected to conduits 54 which congasket taken along the'linet of Fig. '7. neot with the conventional deicer boots carried by'Eigs. l tand-iz show-an air-distributing valve of 3 anaircratt. Asshown in Fig, 2; two additional bracket l,,-has a 'shaftlzconnected to aworm vers passageways I2. Terminals I! may be con- 13 1 speedrgducmgkunlt including wheel u nected to conduits leading to boots onthe rudder sxconnected to. astub shaitall. :Shaft It carries a t dStabilizers the ft- --second-* worm lt which'drivesa second wheel, Inorder to prevent leakage or air under presshown-cnlypartiany-atailyioturnin therstub surefrom passageway 28 to chamber 35 in the ,:-shaft18;- which carries av-gear i8 and pin 20. p cess of i i n 1' ir to ports31, a novel actionmotion. shaittztconnects to "the hub 23 spongeneoprene" cemented to the bottom 01 reofotorgzg;hgvingiendhbearing311113.083 :5 and cesslil along the s ace 58.A suitable! cement 18-26 carried bythe' verticalwalls of the housing 50is known in the trade as Fairprene. Gasket 51 of distributor-valve fl.i'Rotor 'fl has two, fluid is dimensioned to fit within recess 56 withits inpassageways therethroughpnwhich connects to her periphery flushwith the inner surface of pas- 'tangular cross-section is moulded in theshape shown in detail in Figs- 3-6, and when projected in plan, itsoutlines, as Y shown in Fig. 3, coincide with the outlines of gasket 51as shown in Fig. 7. Facing member 59 is formed with an inner, orgasket-engaging surface including flat shoulder portions 59, and anangular ridge 6| projecting between shoulder portion 50. Member 59 hasinner and outer wall portions 62 and 83, respectively, extendingrectangularly from shoulder portions 50, and terminating in an arcuatelyshaped sealing surface 64.

Surface 64 is curved at a radius R as indicated in Fig. 5, which radiusis equal to the radius of the inner surface of liner 35, so that surface64 and the surface of liner 36 will have equal curvature. The sealingmember 59 used with the gasket 51, the measurements of which are notedabove, has a radius of one and five-eighths inches to mate with surfaceof liner 36 having the same radius.

the curvature of liner 36 as to give a true line,

[rather than point seal between the passageway 28 (or 3|) and chamber35.

While only one embodiment of the present inventipn has been shown in thedrawings, it is to be understood that various changes may be madewithout departing from the scope or the present invention. For thisreason, it is intended not to limit the invention by the descriptionherein given as an example, but solely by the scope of the appendedclaims. What is claimed is:

1. In combination with acylindrical chamber I having an inner wall and aseries of angularly disposed fluid ports opening thereinto; a rotaryvalve member mounted for rot'ation'axially withl in said chamber andhaving a fluid passageway,

The sealing member 59, when in position, as

shown in Figs. Land 2, compresses gasket 51,

' with the result that ridge BI is embedded into gasket 51 in agas-tight relation, thus preventing air under pressure in passageway 28from being diverted or by-passed between the contacting surfaces ofgasket 51 and facing member 59. The compression of gasket 51 by facingmember 59 is not total, and further compression is permissible and isintended for the proper functioning of the novel sealing unit of thepresent invention.

A similar sealing unit, including a gasket 51 and a facing member 59, isarranged within a rabbet 85 formed in the mouth 34 of passageway 3l. Itis believed unnecessary to further describe this latter sealing unit,since it is identical to that in rabbet 56.

The novel sealing unit above described is particularly adapted for usein an air distributor of the type represented by 21. In aircraft deicingsystems, air may be distributed cyclically to a whole series of rubberboot elements, and it is also, after inflation of a particular boot,dumped overboard to the atmosphere, and then placed under suction untilreinflated. Air under pressure enters passageway 28, and when thispassageway communicates with bottom port 31, as shown in Figs. 1 and 2,the air is vented to the said member having. a radially projectingportion terminating in an aperture mouth affording communication withsaid passageway, said projecting portion being formed with acomplementally curved face for frictional engagement with saidcylindrical wall, said face being provided with a recess adjacent theapertured mouth in encircling relation-thereto; and seali'ng'means insaid recess, said sealing means including an annular shape inner cushionmember of sponge-like resilient material cemented in said recess, and acomplementally shaped outer solid carbon facing memberin said recessbetween said cushion member and said inner wall, said facing memberhaving on one side a continuous integral tapered projection embedded insaid cushion member and its opposite side being formed with a curvedface of the same radius as the face on said projecting portion inresilient engagementwithsaid-inner wall.

2. In combination with a cylindrical chamber having an inner wall and aseries of angularly disposed fluid ports opening thereinto; a rotaryvalve member mounted for rotation axially withexterior through Venturitube 39, and the flow ties in the cylindrical surface of liner 3B,misalignment or lack of precise coaxiality between rotor 24 and liner 36and small irregularity in the fit between mouth 30 (as well as mouth 34)and liner 36, all tend to permit leakage between chamber 35 andpassageways 28 and 3|, but the novel sealing unit is self-compensatingfor misalignment and surface irregularities, since the in said chamberand having a fluid passageway,

said member having a radially projecting portion terminating in anapertured mouth affording communication with said passageway, saidprojecting portion being formed with a complementally curved face forfrictional engagement with said cylindrical wall, said face beingprovided with a recess adjacentthe apertured mouth in encirclingrelation thereto;- and sealing means in said recess, said sealing meansincluding an annular shape inner cushion member of spongelike resilientmaterial cemented in said recess. and a complementally shaped outersolid carbon facing member'in said recess between said cushion memberand said inner wall, said facing,

member having on one side a continuous angular 7 projection embedded insaid inner cushion member and integral laterally projecting walls at thebase of said angular projection for limiting the penetration of thelatter, said facing member being formed on its side opposite the angularrojection with a curved face of the same radius as the face on saidprojecting portion and resil- I iently engaging said inner wall.

- HOWARD A. ALEXANDERSON.

HERMAN J.WOLF.

